nonmortal in English dictionary nonmortal Meanings and definitions of "nonmortal" Not subject to mortality; undying, immortal. Not deadly; nonfatal. One who is not mortal; an immortal. adjective Not subject to mortality; undying, immortal. adjective Not deadly; nonfatal. noun One who is not mortal; an immortal. more Grammar and declension of nonmortal nonmortal ( plural nonmortals) nonmortal ( not comparable) nonmortal (not comparable) nonmortal (plural nonmortals) more Sample sentences with "nonmortal" Declension Stem Try again Authors